Sanyo

downloading thumbnails to 7300, how, use usb cable?

I'm new to the forum and new to the sanyo 7300. I see where we can pay $1.00 for a screensaver download. How can I download a photo to match up with a caller id number? Nothing in the book tells how. They only tell how to download a screensaver. I have a Futuredial usb cable where I can use the phone as a modem. How can I use this cable to download photos? There has to be a way.